ToolsInstaller: Use chcon over restorecon

restorecon probes file_contexts to get the context
to be applied to the file. /sbin/.magisk does not
exist in file_contexts for obvious reasons so restorecon
always fails. Use chcon directly with the system_file
context to allow contexts to be applied.

Suggested-by: Chris Renshaw <osm0sis@outlook.com>
Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/java/com/wireguard/android/util/ToolsInstaller.java

@@ -123,7 +123,7 @@ public final class ToolsInstaller {
         script.append("touch /sbin/.core/img/wireguard/auto_mount; ");
         for (final String[] names : EXECUTABLES) {
             final File destination = new File("/sbin/.core/img/wireguard" + INSTALL_DIR, names[1]);
-            script.append(String.format("cp '%s' '%s'; chmod 755 '%s'; restorecon '%s' || true; ",
+            script.append(String.format("cp '%s' '%s'; chmod 755 '%s'; chcon 'u:object_r:system_file:s0' '%s' || true; ",
                     new File(nativeLibraryDir, names[0]), destination, destination, destination));
         }
         script.append("trap - INT TERM EXIT;");